Preprocessing And Analytical Results Of The Tidal Gravity Observations Recorded With A Superconducting Gravimeter At Jiufeng Station, Wuhan

In all kinds of the instruments detecting the Earth's gravity field at present, the Superconducting Gravimeter (SCG) is considered by the international researchers as the one with the highest precision, the best continuity and stability. The GWR C032 SCG installed at Jiufeng Geodynamic Station, Wuhan/China, is the unique instrument not only in China but also in the Asian Continent. It is undergoing the Global Geodynamic Project (GGP) proposed and executed by the Committee on the Study of the Earth's Deep Interior (SEDI) belonging to the International Union of Geodesy and Geophysics (IUGG). The work in this paper is on the basis of the background mentioned above.Based on the tidal gravity observation recorded with the GWR C032 superconducting gravimeter at Jiufeng station, Wuhan/china, the scale values of the GWR C032 SCG and the LCR-ET20 spring gravimeter are accurately determined with the method of instrumental same-site observing. Using the Tsoft tidal data preprocessing software developed by P. Vauterin working in the Royal Observatory of Belgium, the tidal gravity observation are processed and the data for the international data exchange and the analysis are prepared. Then, harmonic analysis is done with the newest Baytap-G tidal data analyzing software developed by Ishiguro and Professor Tamura, who are working in Japan and the Eterna34 tidal data analyzing software developed by Wenzel, who had worked in German. As a result, the recently observed tidal gravity parameters of Jiufeng station are obtained. Finally, the ocean loading correction of the observing tidal gravimetric parameters, the temporal synthesized tide, correction of the station air pressure and the polar motion on the gravity residual, the analysis of the final residual, and so on, are investigated.